At the same time I have sink time and money into grading which is another cost that eats into the thin margins. Maybe this is my own personal experience but I feel like a lot of people will have the same experience as I do
They included Vanguard of Brimaz (Born of the Gods, 2014), Eternal Dominion (Saviors of Kamigawa, 2005), Pegasus Stampede (Tempest Remastered, 2015), Oubliette (Double Masters, 2020), Man-o-War (Modern Horizons, 2019), Brothers Yamazaki (Champions of Kamigawa, 2004), and Brain Freeze (Vintage Masters, 2014)
You get what kind of deck Goblin King is going to lead to
The Mega ex cards themselves are worth having at your disposal, each offering a vastly different playstyle
They are a constructive way to get some direction
If you arent aware, you completely exile an opponents library with Helm of Obedience and any one of those, which is certainly potent